14x36x1 MERV 8 AC Furnace Filters 6 Pack spl_luxx These loose round plugs fit

These loose round plugs fit perfectly into the Gro-Block hole

including orchids

This tool is ideal for both professional landscapers & hobby gardeners

It eliminates algae by covering the top of the media

and you're in trouble

14x36x1 MERV 8 AC Furnace Filters 6 Pack spl_luxx These loose round plugs fitNordic Pure MERV 8 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters